Risk factors and diagnostic biomarkers for asymptomatic immune checkpoint inhibitor-related myocarditis in patients with esophageal cancer after immunotherapy

Table 4 Electrocardiogram, n (%)

Parameters	Non-occurrence group (n = 134)	Occurrence group (n = 68)	t value	P value
Premature atrial contractions	8 (5.97)	3 (4.41)	0.018	0.894
Premature ventricular contractions	5 (3.73)	2 (2.94)	0	1.000
Episodes of non-sustained supraventricular tachycardia	27 (17.91)	21 (30.88)	2.868	0.090
Episodes of non-sustained ventricular tachycardia	110 (82.09)	52 (69.12)	0.897	0.344
QRS duration			4.384	0.036
≥ 110 ms	24 (17.91)	21 (30.88)
< 110 ms	110 (82.09)	47 (69.12)